Adding FireFox to the run, but don't make the build fail.
Adding FireFox to the run, but don't make the build fail.

beni55/web-animations-js-legacy,beni55/web-animations-js-legacy,birtles/web-animations-js,web-animations/web-animations-js-legacy,web-animations/web-animations-js-legacy,beni55/web-animations-js-legacy,birtles/web-animations-js,web-animations/web-animations-js-legacy,birtles/web-animations-js,beni55/web-animations-js-legacy